165.21.138.210
165.21.138.210 is an IPv4 address operated by IRT-SINGNET-SG (AS3758), geolocated to Singapore, Singapore. Its reverse DNS name is SN-SINTP1-AU304-te4-2.singnet.com.sg. As of October 24, 2026, IPDebrief rates it High Risk (70/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Organization | IRT-SINGNET-SG |
| ASN | AS3758 |
| Network Name | SINGTEL-NETWORKS-165-21-138-0 |
| CIDR Block | 165.21.138.0/24 |
| RIR | ARIN |
| Country | SG |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | SN-SINTP1-AU304-te4-2.singnet.com.sg |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | SN-SINTP1-AU304-te4-2.singnet.com.sg |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS3758 |
| Network Prefix | 165.21.0.0/16 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 50% | 2 | 3 |
| Overall | 25% | 6 | 8 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-10-24 05:22:06 UTC |
| Last Seen | 2026-10-24 05:22:06 UTC |
| Profile Built | 2026-10-24 05:37:26 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 20 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 165.21.138.210
Who owns the IP address 165.21.138.210?
165.21.138.210 is registered to IRT-SINGNET-SG. The address falls within the 165.21.138.0/24 network block. Registration is held at ARIN.
Where is 165.21.138.210 located?
Geolocation data places 165.21.138.210 in Singapore, SG, Singapore. The local time zone is Asia/Singapore. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 165.21.138.210 malicious or safe?
165.21.138.210 currently carries a high risk assessment, meaning indicators associated with malicious or abusive activity have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 165.21.138.210?
The reverse DNS (PTR) record for 165.21.138.210 is SN-SINTP1-AU304-te4-2.singnet.com.sg. This hostname is forward-confirmed, meaning it resolves back to the same address.